Device or fixture for determining the balance of annular parts



Jan. 27. 19 1,524,041

H. J. LEIGHTON DEVICE 0R FIXTURE FOR DETERMINING THE BALANCE OF ANNULAR PARTS Filed Aug. l5, 1922 2 Sheets-Sheet 1 lllllli 7 2 JNVIEIIVTOR. BY. .MJZIHORNEYSV Jan. 27,1925- 1,524,041

. H.J+LEGHT@N 1 DEVICE OR FIXTURE FOR'DETERMINING THE BALANCE, OF ANNULAR PARTS Filed: Aug. 15, 1922 2 Sheets-Sheet 2 i INVENTOR.

MM TTORNEYS' Patented Jan. 27, 1925.

UNITED STATES PATENT OFFICE.

HERBERT J. LEIGHTON, O'F SYRACUSE, NEW YORK.

DEVICE OR FIXTURE FOR DETERMINING THE BALANCE OF ANNULAR PARTS.

Application filed August 15, 1922. Serial No. 581,991.

Toyall whom it may concern:

Be it known that I, HERBERT J. LEIGHTON, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga and State of New York, have invented a certain new and useful Device or Fixture for Determining the Balance of Annular Parts, of which the following is a specification.

This invention has for its object the production of a device or fixture for balancing parts which in use rotate or for determining if and where such parts are overbalanced in order that they may be balanced by takingoff small portions on the heavier side or adding weight on the diametrically opposite lighter side, which device or fixture is particularly simple in construction and operation, and highly eflicient and durable in use. The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a plan view of this device.

Figures 2 and 3 are vertical sectional views taken at a right angle to each other, the part to be balanced being omitted in Fig. 2, and the contiguous portion of a tool as a drill for removing metal from the heavier or overbalanced side of the part be ing shown.

This device or fixture comprises generally, a base, a balanced carrier for the part to be balanced mounted on the base, and means for fulcruming the carrier at its vertical axis and for raising it off the base whereby it is free to tilt in any direction if the part to be balanced is overbalanced on one or more sides.

1 designates the base which is here shown as formed with concentric raised seats 2, 3,

spaced apart, the seat 2 being preferably flat and annular and the seat 3 being conical and formed on a central upwardly extending boss or projection 4. 5 is the carrier which comprises a central hub 6, an outer rim 7, and a web or spokes 8. The hub 6 has an internal conical seat 9 normally resting on the seat 3, and the rim 7 has a flange 10 on the lower side which rests on the seat 2. The hub is also formed with a peripheral hearing or center post 11 for receiving the hub 12 of the part 1-3 to be balanced. The part is here shown as the pressure ring 0 'a friction clutch such as are used in motor Vehicles.

14 is a fulcrum point located within the hub coaxially therewith and opposedto the means for elevating the carrier 5 off the seats 2, 3. The point is here shown as at the end of a pin or spindle 15, the shank of which is arranged in an axial bore in the hub 5 and is also illustrated as a ball arranged at the apex of the conical head of the pin. The point or ball is normally spaced from the means for extending the carrier 5 in order that the point or ball may not become unduly worn. The pin 15 is adjustable axially by inserting spaclng washers 16 or different thicknesses between the head of the pin and the opposing face or bottom of the recess 17 in the hub in which recess the head of the pin is located, there preferably being a spacing washer for each class or size of articles on which the machine operates. The fulcrum 14 is preferably placed as near as possible to the center of gravity of the carrier 5 and article thereon, to be balanced so that the unbalancing of the article can be more accurately determined.

The means for lifting the carrier 5 off the seats 2, 3, comprises a plunger 18 mov able vertically in the boss 4 and having its end face exposed in the recess 17 of the hub 6, in such position that the fulcrum is normally slightly spaced. from the plunger, and an operating member as a lever 19 for elevating the plunger. The lever 19 is pivoted at 20 to the base 1 and has an arm 21 which thrusts against the end of a rod or screw 22 threading into the lower end of the plun er. This screw 22 is for the purpose of a justing the plunger axially so as to be of proper height to cooperate efficiently with the fulcrum point 14. The screw is held in its adjusted position by a lock nut 23. .The lever 19 is normally held in such position as to hold the end. of the plunger away from the fulcrum point by a suitable spring 24.

In operation, the part to be balanced is placed on the seats 2, 3, of the carrier 5 and the lever 19 depressed to elevate the plunger 18 and hence lift the part oil the seats2, 3, so that it is supported by the central fulcrum oint 14.

If one side of t e ring or part is overbalanced, such heavier side will cause the part to tilt about the point 14:. The lever can then be released and a small portion of the material on such heavier side removed as by a drill and the operations repeated until the part balances.

What I claim is: c

1. A device for balancing annular parts comprising a base formed with a seat, an annular carrier normall resting on the seat, means arranged coaxia 1y with the vertical axis of the carrier for fulcruming the carrier whereby it is tiltable outof a horizontal plane in all directions, and means for lifting the fulcrum to raise the carrier off the seat topermitit to tilt, substantially as and for the purpose set forth.

2. A devicefor balancing annular parts comprising a base formed with a central conical seat, and an annular seat concentric with the conical seat, a horizontal annular carrier for such part to be balanced, the carrier having bearing faces complemental to such seats and also having a coaxial conical fulcrum point, and vertically shiftable means associated with the base on which the oint rests, said means being movable in the base relatively to the carrier and toward and from the carrier and operating to lift the carrier off its seats and permit it to tilt if unbalanced about its fulcrum point, substantially as and for the purpose described.

v 3. A device for balancing annular parts comprising a base formed with an annular support and a projection arranged centrally of said support, the support and projection being formed with seats, a carrier comprisly of the ing a rim and a hub normally resting on the su port and the rojection, and means movable vertically and coaxially of the projection and enga ing the hub in the axis thereof to lift sa1d carrier off the seat and permit it to tilt if unbalanced, substantially as and for the urpose specified.

4. A device for be ancing annular parts comprising a base formed with an annular support and a projection arranged centrally of said support, the support and projection being formed with seats, a carrier comprising, a hub and a rim normally resting on the support and the projection, and fulcrum means com rising a point arranged coaxialub and a plan er movable coaxially of the projection, tie point resting on theend face of the plunger, and means for moving the plunger, substantially as and for the, urpose set forth.

5. A evice for balancing annular parts comprising a base formed with concentric and spaced apart bearing faces, a carrier restin on the bearing faces, and means arrange coaxia-lly of the carrier for lifting it off the bearing faces whereby it is free to tilt, said means being shiftable vertically relatively to the base toward and from and into and out of enga ement with the carrier, substantially as and for the purpose described.

In testimony whereof, I have hereunto signed m name, at Syracuse, in the count of Onon aga, and State of New York, this 8th 'day of Aug, 1922.

HERBERT J. LEIGHTON. 

